Page 2 of 2 FirstFirst 12
Results 17 to 31 of 31

Thread: Power consumption

  1. #17
    Senior Member
    Join Date
    May 2004
    Location
    Rochester, NY
    Posts
    1,041
    Thanks
    4
    Thanked
    8 times in 8 posts
    • oralpain's system
      • Motherboard:
      • DFI "Blood Iron" P35-T2RL
      • CPU:
      • Intel Pentium E2140 @ 400x8 (3.2GHz), 1.375v
      • Memory:
      • Crucial Ballistix DDR2 800 CL4 @ 500MHz (DDR 1000), 4-4-4-12-T2, 2.3v
      • Storage:
      • 2x Seagate ST3250410AS
      • Graphics card(s):
      • NVIDIA 8800GTS (G92) 512 @ 783MHz core, 1836MHz shader, 1053Mhz memory, stock cooling 70% fan speed
      • PSU:
      • Seasonic SS-500GB
      • Case:
      • Antec P182, with some small modifications
      • Monitor(s):
      • ASUS VW222U
      • Internet:
      • Time Warner "Road Runner" Cable - 16 megabit downstream, 1 megabit upstream
    I've been screwing around with undervolting/underclocking my CPU.

    Right now im running at 0.85v, 800Mhz and the computer is perfectly usable. I'm also passively cooling it. Idel temps are 1C above ambient, load gets into the lower 30s (these are tCASE temps, not on-die, obviously). I think this would be the way to go for silence, though in a closed case a very low speed fan or larger than stock heatsink might be needed.

    EDIT: droped voltage to 0.8, the lowest I can go. Very stable at 800MHz. Oddly enough, I can still play all my games just fine. FPS is significantly lower, but everything is very playable.
    Last edited by oralpain; 18-04-2005 at 02:27 PM.

  2. #18
    DsW
    DsW is offline
    Senior Member
    Join Date
    Aug 2003
    Location
    Glasgow
    Posts
    292
    Thanks
    0
    Thanked
    0 times in 0 posts
    Cheers for the magazine pointer Lu-tze - I'll try and get hold of a copy.

    Interestingly, Tom's Hardware Guide stated that the Mac Mini used only 20W when idle.. which sounds great.. now if it was only half the price and had a 300GB hard drive

  3. #19
    Senior Member
    Join Date
    Mar 2005
    Location
    Letchworth Garden City
    Posts
    256
    Thanks
    0
    Thanked
    0 times in 0 posts
    Quote Originally Posted by DsW
    Cheers for the magazine pointer Lu-tze - I'll try and get hold of a copy.

    Interestingly, Tom's Hardware Guide stated that the Mac Mini used only 20W when idle.. which sounds great.. now if it was only half the price and had a 300GB hard drive
    Its very quiet and will go into sleeping mode when left untouched. The server for windows/ smb and other server functions are easily switched on with one click. Ive stored my entire music collection on mine, and transferring music through my netgear box works perfectly.....ooh, Ive just realised I am trying to sell u a mac...sorry . Anyway Thats the mini, I couldnt resist myself! If you are tempted, use the apple store for higher eductation, you get a 10% discount.

    EDIT: Did I mention, its easy to set it up to run headless, and an external firewire HD can be used also. btw how much music do you have anyway?
    Last edited by tommylittleboy@; 20-04-2005 at 10:51 PM.

  4. #20
    DsW
    DsW is offline
    Senior Member
    Join Date
    Aug 2003
    Location
    Glasgow
    Posts
    292
    Thanks
    0
    Thanked
    0 times in 0 posts
    I've not done half my CDs yet and I'm at 100GB (flac files). After that it's my vinyl and MD collection.. plus I need to factor in future CD purchases etc.

  5. #21
    Senior Member
    Join Date
    Mar 2005
    Location
    Letchworth Garden City
    Posts
    256
    Thanks
    0
    Thanked
    0 times in 0 posts
    Quote Originally Posted by DsW
    I've not done half my CDs yet and I'm at 100GB (flac files). After that it's my vinyl and MD collection.. plus I need to factor in future CD purchases etc.
    PC it is then! haha

  6. #22
    DsW
    DsW is offline
    Senior Member
    Join Date
    Aug 2003
    Location
    Glasgow
    Posts
    292
    Thanks
    0
    Thanked
    0 times in 0 posts
    In case anyone's interested.. I've opted for the setup below. I reckoned it gives the best balance of flexibility, functionality, value and low power consumption.

    Living room PC / SlimServer PC

    VIA EPIA SP 13000 £150
    Hipermedia Chassis £55
    Panasonic Slot Load Notebook DVD writer £48
    Samsung Spinpoint HDD 80GB £37
    Cat5 crossover cable connected to Squeezebox 2 Wireless £2

    NAS

    Lacie 500GB Ethernet disk £400


    Putting the server PC in the living room has two advantages

    1. I can take advantage of the Squeezebox 2's bridging capability to allow wireless connectivity (thus removing the need for a seperate card)
    2. I can hook it upto the TV for internet browsing

    NAS has several advantages

    1. Server PC can be small and quiet
    2. easy expansion
    3. low power consumption
    4. can be accessed from any PC on the network

    However.. its' pretty damn expensive and I'll need to buy two of each NAS device if I want to keep backups

    Did look at Mac Mini but that would have added about £200 to the price of my server PC so it was a no-brainer.

    Anyway.. thanks for all your help and have a good weekend!

  7. #23
    Senior Member
    Join Date
    May 2004
    Location
    Rochester, NY
    Posts
    1,041
    Thanks
    4
    Thanked
    8 times in 8 posts
    • oralpain's system
      • Motherboard:
      • DFI "Blood Iron" P35-T2RL
      • CPU:
      • Intel Pentium E2140 @ 400x8 (3.2GHz), 1.375v
      • Memory:
      • Crucial Ballistix DDR2 800 CL4 @ 500MHz (DDR 1000), 4-4-4-12-T2, 2.3v
      • Storage:
      • 2x Seagate ST3250410AS
      • Graphics card(s):
      • NVIDIA 8800GTS (G92) 512 @ 783MHz core, 1836MHz shader, 1053Mhz memory, stock cooling 70% fan speed
      • PSU:
      • Seasonic SS-500GB
      • Case:
      • Antec P182, with some small modifications
      • Monitor(s):
      • ASUS VW222U
      • Internet:
      • Time Warner "Road Runner" Cable - 16 megabit downstream, 1 megabit upstream
    You could just get a network hardrive. You don't need a whole computer just to share files.

  8. #24
    Senior Member
    Join Date
    Jan 2005
    Location
    Manchester
    Posts
    2,898
    Thanks
    67
    Thanked
    179 times in 134 posts
    • Butcher's system
      • Motherboard:
      • MSI Z97 Gaming 3
      • CPU:
      • i7-4790K
      • Memory:
      • 8 GB Corsair 1866 MHz
      • Storage:
      • 120GB SSD, 240GB SSD, 2TB HDD
      • Graphics card(s):
      • MSI GTX 970
      • PSU:
      • Antec 650W
      • Case:
      • Big Black Cube!
      • Operating System:
      • Windows 7
    Quote Originally Posted by oralpain
    For the kind of system you seem to want, get a good active PFC powersupply (zippy, pc power and cooling), a quality mobo that lets you use a wide range of below stock voltages, a cheap video card, a single stick of ram, and a single large harddrive. You could easily build a PC that uses less than 60 watts total most of the time.
    Active PFC is less efficient than passive (or no) PFC. you're better off without it for minimum consumption (unless you're charged for bad power factor).

  9. #25
    DsW
    DsW is offline
    Senior Member
    Join Date
    Aug 2003
    Location
    Glasgow
    Posts
    292
    Thanks
    0
    Thanked
    0 times in 0 posts
    Quote Originally Posted by oralpain
    You could just get a network hardrive. You don't need a whole computer just to share files.
    I'm not just sharing files mate - I need to run the SlimServer app to control my Squeezebox 2.

    http://www.slimdevices.com/su_downloads.html

  10. #26
    Senior Member
    Join Date
    May 2004
    Location
    Rochester, NY
    Posts
    1,041
    Thanks
    4
    Thanked
    8 times in 8 posts
    • oralpain's system
      • Motherboard:
      • DFI "Blood Iron" P35-T2RL
      • CPU:
      • Intel Pentium E2140 @ 400x8 (3.2GHz), 1.375v
      • Memory:
      • Crucial Ballistix DDR2 800 CL4 @ 500MHz (DDR 1000), 4-4-4-12-T2, 2.3v
      • Storage:
      • 2x Seagate ST3250410AS
      • Graphics card(s):
      • NVIDIA 8800GTS (G92) 512 @ 783MHz core, 1836MHz shader, 1053Mhz memory, stock cooling 70% fan speed
      • PSU:
      • Seasonic SS-500GB
      • Case:
      • Antec P182, with some small modifications
      • Monitor(s):
      • ASUS VW222U
      • Internet:
      • Time Warner "Road Runner" Cable - 16 megabit downstream, 1 megabit upstream
    How is active PFC less efficent?

    Isn't a higher power factor normally more efficent by definition?

    Granted the difference is not large, in most cases, but from what I've seen active PFC PSUs are a bit more efficent and lower EMI can help too.
    Last edited by oralpain; 22-04-2005 at 07:29 PM.

  11. #27
    YUKIKAZE arthurleung's Avatar
    Join Date
    Feb 2005
    Location
    Aberdeen
    Posts
    3,280
    Thanks
    8
    Thanked
    88 times in 83 posts
    • arthurleung's system
      • Motherboard:
      • Asus P5E (Rampage Formula 0902)
      • CPU:
      • Intel Core2Quad Q9550 3.6Ghz 1.2V
      • Memory:
      • A-Data DDR2-800 2x2GB CL4
      • Storage:
      • 4x1TB WD1000FYPS @ RAID5 3Ware 9500S-8 / 3x 1TB Samsung Ecogreen F2
      • Graphics card(s):
      • GeCube HD4870 512MB
      • PSU:
      • Corsair VX450
      • Case:
      • Antec P180
      • Operating System:
      • Windows Server 2008 Standard
      • Monitor(s):
      • Dell Ultrasharp 2709W + 2001FP
      • Internet:
      • Be*Unlimited 20Mbps
    Active PFC reduce line load. Instead of going 10A then 1A current, it averages out at 5~6A, hence saving cable cost. It does not affect power conversion efficiency at all.

    DO NOT GET THE LACIE DISK. I've seen loads of people with failed Lacie due to poor cooling design. They're not meant to run for 7x24, I doubt they can even run 7x8.

    Samsung Spinpoint HDD 80GB £37 <--Get a Hitachi 5K80 instead.

    Save all your trouble and get an imac mini, you don't need to pay for winxp license that way. Do you really need a DVDROM there (let alone writer)? You could copy from network, and I doubt you would burn a dvd from there.

    You could play a DVD over network though so there is no big need for that notebook cdrom.
    Workstation 1: Intel i7 950 @ 3.8Ghz / X58 / 12GB DDR3-1600 / HD4870 512MB / Antec P180
    Workstation 2: Intel C2Q Q9550 @ 3.6Ghz / X38 / 4GB DDR2-800 / 8400GS 512MB / Open Air
    Workstation 3: Intel Xeon X3350 @ 3.2Ghz / P35 / 4GB DDR2-800 / HD4770 512MB / Shuttle SP35P2
    HTPC: AMD Athlon X4 620 @ 2.6Ghz / 780G / 4GB DDR2-1000 / Antec Mini P180 White
    Mobile Workstation: Intel C2D T8300 @ 2.4Ghz / GM965 / 3GB DDR2-667 / DELL Inspiron 1525 / 6+6+9 Cell Battery

    Display (Monitor): DELL Ultrasharp 2709W + DELL Ultrasharp 2001FP
    Display (Projector): Epson TW-3500 1080p
    Speakers: Creative Megaworks THX550 5.1
    Headphones: Etymotic hf2 / Ultimate Ears Triple.fi 10 Pro

    Storage: 8x2TB Hitachi @ DELL PERC 6/i RAID6 / 13TB Non-RAID Across 12 HDDs
    Consoles: PS3 Slim 120GB / Xbox 360 Arcade 20GB / PS2

  12. #28
    DsW
    DsW is offline
    Senior Member
    Join Date
    Aug 2003
    Location
    Glasgow
    Posts
    292
    Thanks
    0
    Thanked
    0 times in 0 posts
    Quote Originally Posted by arthurleung
    DO NOT GET THE LACIE DISK. I've seen loads of people with failed Lacie due to poor cooling design. They're not meant to run for 7x24, I doubt they can even run 7x8.

    Samsung Spinpoint HDD 80GB £37 <--Get a Hitachi 5K80 instead.

    Save all your trouble and get an imac mini, you don't need to pay for winxp license that way. Do you really need a DVDROM there (let alone writer)? You could copy from network, and I doubt you would burn a dvd from there.

    You could play a DVD over network though so there is no big need for that notebook cdrom.
    Interesting point about the Lacie disk. Will check it out more.

    Why do you recommend a Hitachi instead of the Samsung? Is it as quiet?

    I was planning on using either Gentoo or Debian anyway so no XP license needed. No way I'm paying another £200 for a Mac Mini.

    The DVD writer is there mainly to install the OS. I couldn't actually find a notebook style DVD-ROM drive when I looked - only writers. If you know of somewhere selling one then a link would be great! The case only takes the notebook style.

  13. #29
    YUKIKAZE arthurleung's Avatar
    Join Date
    Feb 2005
    Location
    Aberdeen
    Posts
    3,280
    Thanks
    8
    Thanked
    88 times in 83 posts
    • arthurleung's system
      • Motherboard:
      • Asus P5E (Rampage Formula 0902)
      • CPU:
      • Intel Core2Quad Q9550 3.6Ghz 1.2V
      • Memory:
      • A-Data DDR2-800 2x2GB CL4
      • Storage:
      • 4x1TB WD1000FYPS @ RAID5 3Ware 9500S-8 / 3x 1TB Samsung Ecogreen F2
      • Graphics card(s):
      • GeCube HD4870 512MB
      • PSU:
      • Corsair VX450
      • Case:
      • Antec P180
      • Operating System:
      • Windows Server 2008 Standard
      • Monitor(s):
      • Dell Ultrasharp 2709W + 2001FP
      • Internet:
      • Be*Unlimited 20Mbps
    Quote Originally Posted by DsW
    Interesting point about the Lacie disk. Will check it out more.

    Why do you recommend a Hitachi instead of the Samsung? Is it as quiet?

    I was planning on using either Gentoo or Debian anyway so no XP license needed. No way I'm paying another £200 for a Mac Mini.

    The DVD writer is there mainly to install the OS. I couldn't actually find a notebook style DVD-ROM drive when I looked - only writers. If you know of somewhere selling one then a link would be great! The case only takes the notebook style.
    The hitachi is 2.5" (I said 5K80 not 7K80)
    Workstation 1: Intel i7 950 @ 3.8Ghz / X58 / 12GB DDR3-1600 / HD4870 512MB / Antec P180
    Workstation 2: Intel C2Q Q9550 @ 3.6Ghz / X38 / 4GB DDR2-800 / 8400GS 512MB / Open Air
    Workstation 3: Intel Xeon X3350 @ 3.2Ghz / P35 / 4GB DDR2-800 / HD4770 512MB / Shuttle SP35P2
    HTPC: AMD Athlon X4 620 @ 2.6Ghz / 780G / 4GB DDR2-1000 / Antec Mini P180 White
    Mobile Workstation: Intel C2D T8300 @ 2.4Ghz / GM965 / 3GB DDR2-667 / DELL Inspiron 1525 / 6+6+9 Cell Battery

    Display (Monitor): DELL Ultrasharp 2709W + DELL Ultrasharp 2001FP
    Display (Projector): Epson TW-3500 1080p
    Speakers: Creative Megaworks THX550 5.1
    Headphones: Etymotic hf2 / Ultimate Ears Triple.fi 10 Pro

    Storage: 8x2TB Hitachi @ DELL PERC 6/i RAID6 / 13TB Non-RAID Across 12 HDDs
    Consoles: PS3 Slim 120GB / Xbox 360 Arcade 20GB / PS2

  14. #30
    Senior Member
    Join Date
    Jan 2005
    Location
    Manchester
    Posts
    2,898
    Thanks
    67
    Thanked
    179 times in 134 posts
    • Butcher's system
      • Motherboard:
      • MSI Z97 Gaming 3
      • CPU:
      • i7-4790K
      • Memory:
      • 8 GB Corsair 1866 MHz
      • Storage:
      • 120GB SSD, 240GB SSD, 2TB HDD
      • Graphics card(s):
      • MSI GTX 970
      • PSU:
      • Antec 650W
      • Case:
      • Big Black Cube!
      • Operating System:
      • Windows 7
    Quote Originally Posted by oralpain
    How is active PFC less efficent?
    No, doing more work in the PSU is less efficient.

    Quote Originally Posted by oralpain
    Isn't a higher power factor normally more efficent by definition?
    No. Power factor has little to do with efficiency.
    Power factor is a measure of how resistive vs inductive the load looks. Most AC electrical devices are somwhat inductive, which means they will absorb power during part of the AC cycle then release it during the other part. Power companies don't like this because it means you get a load of power being dumped back on the grid out of phase with the main supply. Power companies thus like your devices to have a power factor close to 1. Active PFC is some circuitry which makes an inductive load (like a transformer) look like a resistive load (like a wire). This is great if you're a large industrial company charged for how good or bad your power factor is. It means nothing to residential customers though as power companies don't charge them for poor power factor.
    Active PFC uses power to do it's correction (hence the term active), which means active PFC supplies are less efficient than passive or no PFC (all other things being equal).

    Quote Originally Posted by oralpain
    Granted the difference is not large, in most cases, but from what I've seen active PFC PSUs are a bit more efficent and lower EMI can help too.
    Active PFC supplies are usually more expensively built, which is where the efficiency and lower EMI comes from. The fact that it has active PFC is irrelevant to how efficient it is - it's largely just a gimmick to sell expensive PSUs.

  15. #31
    Senior Member
    Join Date
    Dec 2004
    Location
    Gateshead/Blueyonderland-Sky-Vergin on mad
    Posts
    258
    Thanks
    0
    Thanked
    0 times in 0 posts
    I believe PFC is a requirement in the EU nowadays or is/was going to be.
    I know they`ve already mucked up a lot of the older standards and regs.

    But read http://www.endpcnoise.com/cgi-bin/e/pfc.html here and make your own mind up with correct info.
    Or google for many other links.
    Last edited by SHISH; 24-04-2005 at 06:11 AM.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Replies: 23
    Last Post: 18-06-2007, 08:31 AM
  2. Vauxhall Electric Power Steering Pump
    By XTR in forum Automotive
    Replies: 8
    Last Post: 19-07-2005, 02:22 PM
  3. power consumption
    By mr_anderson187 in forum PC Hardware and Components
    Replies: 6
    Last Post: 22-01-2005, 01:52 PM
  4. power consumption
    By kingabs in forum PC Hardware and Components
    Replies: 2
    Last Post: 29-02-2004, 12:27 PM
  5. how to choose a PSU?
    By loriel60 in forum PC Hardware and Components
    Replies: 8
    Last Post: 14-01-2004, 04:40 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •